<template>
	<div>
		<!-- 面包屑导航区 -->
		<el-breadcrumb separator-class="el-icon-arrow-right">
			<el-breadcrumb-item :to="{ path: '/home' }"
				>首页</el-breadcrumb-item
			>
			<el-breadcrumb-item>权限管理</el-breadcrumb-item>
			<el-breadcrumb-item>角色列表</el-breadcrumb-item>
		</el-breadcrumb>

		<!-- 卡片视图 -->
		<el-card>
			<!-- 添加角色按钮区域 -->
			<el-row>
				<el-col>
					<el-button type="primary">添加角色</el-button>
				</el-col>
			</el-row>

			<!-- 角色列表区 -->
			<el-table :data="rolelist" border stripe>
				<!-- 展开列 -->
				<el-table-column type="expand">
					<template slot-scope="scope">
						<el-row
							:class="[
								'bdbottom',
								i1 === 0 ? 'bdtop' : '',
								'vcente',
							]"
							v-for="(item1, i1) in scope.row.children"
							:key="item1.id"
						>
							<!-- 渲染一级权限 -->
							<el-col :span="5">
								<el-tag
									closable
									@close="
										removeRightById(scope.row, item1.id)
									"
								>
									{{ item1.authName }}
								</el-tag>
								<i class="el-icon-caret-right"></i>
							</el-col>
							<!-- 渲染二级和三级权限 -->
							<el-col :span="19">
								<!-- 通过for循环 嵌套渲染二级权限 -->
								<el-row
									:class="[i2 === 0 ? '' : 'bdtop', 'vcente']"
									v-for="(item2, i2) in item1.children"
									:key="item2.id"
								>
									<el-col :span="6">
										<el-tag
											type="success"
											closable
											@close="
												removeRightById(
													scope.row,
													item2.id
												)
											"
											>{{ item2.authName }}
											<i class="el-icon-caret-right"></i>
										</el-tag>
									</el-col>
									<el-col :span="18">
										<el-tag
											type="warning"
											v-for="item3 in item2.children"
											:key="item3.id"
											closable
											@close="
												removeRightById(
													scope.row,
													item3.id
												)
											"
										>
											{{ item3.authName }}
										</el-tag>
									</el-col>
								</el-row>
							</el-col>
						</el-row>
						<!-- <pre>
                            {{ scope.row }}
                        </pre> -->
					</template>
				</el-table-column>
				<!-- 索引列 -->
				<el-table-column type="index" label="#"></el-table-column>
				<el-table-column
					label="角色名称"
					prop="roleName"
				></el-table-column>
				<el-table-column
					label="角色描述"
					prop="roleDesc"
				></el-table-column>

				<el-table-column label="操作" width="300px">
					<template slot-scope="scope">
						<el-button
							size="mini"
							type="primary"
							icon="el-icon-edit"
							>编辑</el-button
						>
						<el-button
							size="mini"
							type="danger"
							icon="el-icon-delete"
							>删除</el-button
						>
						<el-button
							size="mini"
							type="warning"
							icon="el-icon-setting"
							@click="showSetRightDialog(scope.row)"
							>分配权限</el-button
						>
					</template>
				</el-table-column>
			</el-table>
		</el-card>

		<!-- 分配权限的对话框 -->
		<el-dialog
			title="分配权限"
			:visible.sync="setRightDialogVisible"
			width="50%"
			@close="setRightDialogClosed"
		>
			<!-- 树形控件 -->
			<el-tree
				:data="rightslist"
				:props="treeProps"
				show-checkbox
				node-key="id"
				default-expand-all
				:default-checked-keys="defKeys"
				ref="treeRef"
			></el-tree>
			<span slot="footer" class="dialog-footer">
				<el-button @click="setRightDialogVisible = false"
					>取 消</el-button
				>
				<el-button type="primary" @click="allotRights">确 定</el-button>
			</span>
		</el-dialog>
	</div>
</template>

<script>
export default {
	data() {
		return {
			// 所有角色列表数据
			rolelist: [],
			// 控制分配权限对话框的显示与隐藏
			setRightDialogVisible: false,
			// 所有权限的数据
			rightslist: [],
			// 树形控件的属性绑定对象
			treeProps: {
				label: 'authName',
				children: 'children',
			},
			// 默认选中的节点id值数组
			defKeys: [],
			// 当前即将分配权限的角色id
			roleId: '',
		};
	},
	created() {
		this.getRolesList();
	},
	methods: {
		// 获取所有角色的列表
		async getRolesList() {
			const { data: res } = await this.$http.get('roles');
			if (res.meta.status !== 200) {
				return this.$message.error('获取角色列表失败');
			}
			this.rolelist = res.data;
			console.log(this.rolelist);
		},
		// 根据id删除对应的权限
		async removeRightById(role, rightId) {
			// 弹框提示用户是否要删除
			const confirmResult = await this.$confirm(
				'此操作将永久删除该文件, 是否继续?',
				'提示',
				{
					confirmButtonText: '确定',
					cancelButtonText: '取消',
					type: 'warning',
				}
			).catch((err) => err);

			if (confirmResult !== 'confirm') {
				return this.$message.info('取消了删除');
			}
			const { data: res } = await this.$http.delete(
				`roles/${role.id}/rights/${rightId}`
			);
			if (res.meta.status !== 200) {
				return this.$message.error('删除权限失败');
			}

			role.children = res.data;
		},
		// 展示分配权限的对话框
		async showSetRightDialog(role) {
			this.roleId = role.id;
			// 获取所有权限的数据
			const { data: res } = await this.$http.get('rights/tree');
			if (res.meta.status !== 200) {
				return this.$message.error('获取权限失败');
			}
			// 把获取到的权限数据保存到data中
			this.rightslist = res.data;
			console.log(this.rightslist);

			// 递归获取三级节点的 Id
			this.getLeafKeys(role, this.defKeys);

			this.setRightDialogVisible = true;
		},
		// 通过递归的形式获取角色下所有三级全选的id
		// 并保存到 defKeys 数组中
		getLeafKeys(node, arr) {
			// 如果当前 node 节点不包含children 属性, 则是三级节点
			if (!node.children) {
				return arr.push(node.id);
			}

			node.children.forEach((item) => {
				this.getLeafKeys(item, arr);
			});
		},
		// 监听分配权限对话框的关闭事件
		setRightDialogClosed() {
			this.defKeys = [];
		},
		// 点击为角色分配权限
		async allotRights() {
			const keys = [
				...this.$refs.treeRef.getCheckedKeys(),
				...this.$refs.treeRef.getHalfCheckedKeys(),
			];

			const idStr = keys.join(',');
			const { data: res } = await this.$http.post(
				`roles/${this.roleId}/rights`,
				{ rids: idStr }
			);
			if (res.meta.status !== 200) {
				return this.$message.error('分配权限失败');
			}
			this.$message.success('分配权限成功');

			this.getRolesList();
			this.setRightDialogVisible = false;
		},
	},
};
</script>

<style lang="scss" scoped>
.el-tag {
	margin: 7px;
}
.bdtop {
	border-top: 1px solid #eee;
}
.bdbottom {
	border-bottom: 1px solid #eee;
}
.vcente {
	display: flex;
	align-items: center;
}
</style>
